Hey there guys,

I recently just purchased a 24Lx24Dx12H PVC enclosure and I would like to heat it using a Radiant Heat Panel. The thing I'm unsure of is whether to purchase a 28 watt or a 40 watt panel. I'm thinking that the 28 would be fine since the enclosure is only 12 inches high but I want to be sure before I purchase.

I'm looking at this page: http://www.reptilebasics.com/rbi-radiant-heat-panels